/usr/share/doc/libaccess-modifier-checker-java/README is in libaccess-modifier-checker-java 1.4-1.
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1 2 3 4 5 6 | Allows applications to define custom access modifiers programmatically,
to be enforced at compile time in the opt-in basis. Obviously,
there's no runtime check either --- this is strictly a voluntary annotations.
This mechanism is useful for actually making sure that deprecated features are not used
(without actually removing such declarations, which would break binary compatibility.)
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